The number one rule of truly successful sales is that the sale doesn't come first -- building a relationship does. And there aren't a lot of "tricks" that work to build solid working relationships between real human beings.
As a marketer myself, I know my strengths and weaknesses. Even though I am extremely well-versed in most forms of Internet marketing, my knowledge is woefully inadequate when it comes to email marketing. While I could find the time to learn it, I would much rather focus on my areas of expertise and find someone else to do my email marketing for me.
This is a perfect example of where your best opportunities are:
Step 1 - Focus your product or service on a niche or specific need.
Step 2 - Build relationships with people in the industry you want to target.
Step 3 - Identify companies or individuals who serve your industry but don't compete.
Step 4 - Find ways to add value to what they do for their clients and vice versa.
Step 5 - Lather, rinse, repeat!